#pragma once


#include <iostream>
#include <string>
#include <unistd.h>
#include "../comm/util.hpp"
#include "../comm/log.hpp"



namespace ns_runner
{
    using namespace ns_log;
    using namespace ns_util;

    class Runner
    {
    public:
        //mem单位是字节(8比特) 
        static void SetProcLimit(int _cpu_limit,int _mem_limit)
        {
            struct rlimit cpu_rlimit;
            cpu_rlimit.rlim_cur = _cpu_limit;
            cpu_rlimit.rlim_max = RLIM_INFINITY;
            setrlimit(RLIMIT_CPU,&cpu_rlimit);
            //超时发送24号信息

            struct rlimit mem_rlimit;
            mem_rlimit.rlim_cur = _mem_limit * 1024; // 转KB
            mem_rlimit.rlim_max = RLIM_INFINITY;
            setrlimit(RLIMIT_AS,&mem_rlimit);
            //超内存发送6号信号
        }
        static int Run(const std::string& file_name,int _cpu_limit,int _mem_limit)
        {
            std::string _execute = PathUtil::Exe(file_name);
            std::string _stdin = PathUtil::Stdin(file_name);
            std::string _stdout = PathUtil::Stdout(file_name);
            std::string _stderr = PathUtil::Stderr(file_name);
            umask(0);

            int _stdin_fd = open(_stdin.c_str(),O_CREAT | O_RDONLY,0644);
            int _stdout_fd = open(_stdout.c_str(),O_CREAT | O_WRONLY,0644);
            int _stderr_fd = open(_stderr.c_str(),O_CREAT | O_WRONLY,0644);

            if(_stdin_fd < 0 || _stdout_fd < 0 || _stderr_fd < 0)
            {
                LOG(ERROR) << "运行时打开文件失败" << "\n";
                return -1;
            }

            pid_t pid = fork();
            if(pid < 0)
            {
                LOG(ERROR) << "运行时创建子进程失败" << "\n";
                close(_stdin_fd);
                close(_stdout_fd);
                close(_stderr_fd);
                return -2;
            }
            else if(pid == 0)
            {
                dup2(_stdin_fd,0);
                dup2(_stdout_fd,1);
                dup2(_stderr_fd,2);

                SetProcLimit(_cpu_limit,_mem_limit);

                execl(_execute.c_str(),_execute.c_str(),nullptr);
                exit(1);
            }
            else
            {
                close(_stdin_fd);
                close(_stdout_fd);
                close(_stderr_fd);

                int status = 0;
                waitpid(pid,&status,0);
                LOG(INFO) << "运行完毕,info: " << (status & 0x7F) << "\n";
                return status & 0x7F;
            }
        }
    };
}



